Best external SSD for gaming 2025: Portable performance drives
But choosing an external SSD means sorting through a dizzying array of options, and making a poor choice can leave you feeling hard done by.
How PCWorld tests and evaluates external storage
The reason writing at greater bit depths is slower is due to the error-checking required to determine if the correct voltage (one of 8/16 levels with TLC/QLC) was written to a cell, rather than the simple charged/not charged binary of 1-bit SLC.